Combined type-writing and computing machine.



w, Wsmf'r. s n COMBINED TYPE WRITING AND C()I'IIILITIIIE MACHINE.

FPLICATION FILED MAI/12| ISIC'. 1,2%55@ Patented Des. 10, i918.

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, COMBINED TYPE wRmNG AND coNPuHNG MACHINE.

/\F PL|CAT IQNA FILED MAY I2, i910.

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APPLICATION EILED MAX l2. 1910.

Patented DCC. 10, 1918.

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W. WRIGHT.

CCIIIBINED IYIIE WRITING AND COMPUTING MACHINE.

APPLICATIQN FILED MAY l2. 1910.

1,287,559. Patented DCC. 10, 1918.

l0 SHEETS-SHEET 4.

W. WRIGHT.

COMBINED IYPE WRITING AND COMPUTING MACHINE.

AJELICATIOIJ` FILED MAY, l2. 1910.

1,287,559. Patented Dec. l0, 1.918.

I0 SHEETS-SHEET 5 W. WRIGHT. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FlLED MAY l2, 1910.

NQ @s Patented Deo. 10, 1918.

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COMBINED TYPE wRlTING AND COMPUTING MACHINE.

APPLICATION FILED MAY I2l 1910.

LQSZL aented Dec. 10, 1918.

24J lo sLufsNEET/ W.` WRIGHT. CUMBINED TYPE WRITING AND COMPUTING'A MACHINE. APPLncMmu, man my x2. mo.

1,287,559, mmm im. 10,1%

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is im@ Patented Deo. 10, 1918.

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W. WRIGHT.

COM-BINED IYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED MAY I2. I9Io.

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COMBINED IYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED MAY l2. 1910.

3.5872559., Fatented Bec. l0. M8.

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*WALTER WRGHT, OF NEVI YORK, N. Y., ASSIGNOR TO UNDERVOOD COMPUTNG MACHINE COMPANY, 0F NEW YORK, N. Y., .A CORLDRTIOF OF NEVI YORK.

COMBINED TYPE-WRTING AND COMPUTING MACHINE.

Specification of Letters Patent.

Patented Dec. i0, 129%).

Application iiled May 12, 1910. Serial No. 560,927.

To all whom it may concern:

Be it known that I, WALTER l/VRIGHT, a citizen of the/United States, residing in New York, in the county of New York and State of New Yorlnhave inventedvcertain new and useful Improvements in Combined Type-Writing and Computing Machines, of which the following is a specification.

This invention relates to computing machines, particularly to combined typewritin and computing mechanism. h

lie principal object of the invention 1s to provide' simple, compact, inexpensive, easily operated and reliable means for multiplication. The invention is shown 1n connection with computing wheels which are power-driven, the extent of rotation of the computing wheels bein determined by a set of keys, preferably t e figure keys of a typewriting machine.

rihese keys operate a variable escapement mechanism, which controls the extent of rotation of the computing wheels under the iniiuence of the motor -or other source of power.

According to the present invention, there is introduced, between the escapement Wheel of the computing mechanism and the masterwheel (which engages said computing wheels individually) a system of gears, which is analogous to a back-gearing, whereby the master-wheel may be caused to rotate automatically either two, three, four, five, six, seven, eight or nine times as far as in the case of simple addition, so that the computing wheels are turned to 'a corresponding extent. This back-gearing is controlled by a special set of keys; and of'these, any one,

representingthe multiplier may be held depressed whlle the-numeral keys of the typewriter are bein manipulated to Write the multiplicand. 'he machine is normally in position tov add, or in other words, to multiply by one, such number as is written by means of the typewriter keys. Each multiplier key disconnects the master-wheel from the` escapement wheel aforesaid, and re-connects said two members to a dierent set of gearing, according to the multiplier key which is depressed.

A further object of the invention is to divide; and to this end there is provided means for reversing the direction of the master-wheel to cause the machine to subtract.y The' manner of operation will be explained fully hereinafter; a succession of subt'ractions enabling the operator to determine the quotient.

Preferably, two or more computing heads are provided, upon one of which individual multiplications or divisions may be performed, while the products of such calculations may be accumulated upon one or more of the remaining computing heads. Said remaining computing heads may comprise a main computing head, such as illustrated in my former applications, and a cross-adder, that is, one that computes apart of a series of numbers extending in a single line across the page.

Other features and advantages will hereinafter appear.

This invention embodies the features disclosed in my pending application No. 490,109, filed April 15, 1909; and it also shows certain features that are disclosed in my pending application No. 485,0-l, filed March 22, 1909.

In the accompanying drawings, Figure l isa front view of the machine; Fig. 2 is a top plan view thereof; Figs. 3, i, 5 and 6 are broken enlarged detail front views of the mechanism, y'in various positions, for connecting the numeral keys with the computing mechanism and for disconnecting them therefrom; Fig. 7 is a broken vertical transverse' section of the front portion of the machine, particularly showing the parts illustrated in Figs. 3 to 6; Fig. 8 is a broken plan view of the computing controller; Fig. 9 is a sectional view of the same, showing the parts in a different position; Fig. 10 is a cross section taken in front of the controller; Fig. 1l is a cross section on the line .a2- of Fig. 8; Fig. 12 is a perspe tive view showing the safety connections between the controller and the Atypewriter escapement; F ig.. l2a is a side view of part of said connections; Fig. 13 is a front view, partly in section through a `portion of the computing mechanism; Fig. 14 is a bottom plan view of the same, partly broken away; Fig. 15 is a transverse vertical section of the same; Fig. 16 is a perspective view, on a reduced scale, of one of the washers; Fig. 17 is a perspective view of one of the transfer wheels;

` Fig. 18 is a similar" view of the same onthe tions between two computing-mechanisms;

Fig. y is a plan. View ofthe column stop bar; Fig. 26 is a cross section on the line o fFig. 244; Fig. 27 is a similar view on the line z-e of Fig. 24;' Fig. 28 isa de- -tail perspectiveview, showing the mecha- "nism for locking at each fourth writing space; "Fig, 2 9 is a side elevation of one end of the'inachine, with a wall of the .casing removed, and disclosing the system of backgearing between the escapement wheel of the computing'mechanism, and the vertical ro- 'tary shafts which connect to the computing Fig. 30 is a sectional elevation on a larger scale ofthe gears at the left-hand end of. thejsystem of gearing 'seen at Fig. 29,

' showing the -parts. normally connected lforA adding, and also the clutch 'for disconnecting the parts' so that Yother sets'ot gears maybe caused to intervenebetween the escapement .wheel and the 'master' wheel.;'Fig."31 is -a jfront elevation showing/the multiplier keys which control the gears seen at Fig. 29, and alsoshowing certainof said gears; Fig. 32 is a sectional elevation taken through the" systemof gearing seenat Fig. 29, and show y t ing one set in the system orf back gears; Fig.

1.33"'i's .a front elevation showing diagrammatically the'main cQinputing head (such as seen at Fig.:1) and two supplemental computing heads; Fig. flis a diagram to illustrate the connections whereby the three com- .puting'headsat Fig. .33 mayv be' operated' for -v either' addition, subtraction, multiplicationv `or division; the partev seen at said diagram correspondingto'thoseseen at the left-hand part of k-Fig.29;iFig'.35 is a diagrammatic Sideelevationfgfftheftype-action of a Remv ingtonunder-strike typewriter, such as illustrated in Fig, 1, showing a method of disccnnecting'the typesfrom` the keys, so that computation "may be effected without writing; Fig. 36 is a Iplano'the same, showing the typesconnected tothe keys; Fig. 37 isa sectional-.front elevation of the devices, in thesame positions as at Fig., 36; Fig. 38 is a view ysimilar to Fig; 37, 'but showing the types disconnected from the-keys.

General 'usa-The drawings show' the inf' vention as applied toa Remington ty ewriter, but it 1s to be understood that, with suitable changes, it may be applied to Ha typewriter of any standard construction,vv

Lacasse 29 is interposed and also that the invention may he embodied in the form of a computing machine, or a computing and printing machine, complete in itself, and not attached machine.' v

Key connection controL-Secured to the frame 1 of the typewriting machine is a to a typewriting vertical plate 2 extending longitudinally ofy the machine over the key levers 3, (Figs. ,1,

v4and@ t0 7).; and, secured upon the front side .of said plate 2, are guides 4: for a slide bar 5. Through holes in'said slide bar pass' the 4stems 6 of hooks 7,'said .hooks lbeing* adaptedto enter eyes 8 in loops 9 secured around the numeral key levers 10.A Said hook stems, in the manner-t0 bepresently described, constitute the means. forcontrolling the operation of the computing mechaf nism.

mechanism is actuated, but, when the slide bar is moved to thesright, so that the hooks are'disengaged fromsaid Veyes, the computing mechanism is disconnected from the numeral keys. To 'move bar-longitudi-l nally,'there is secured upon saidbar near.- the left hand end thereof a socket piecel 11,'

It is sufficient for thefxpresent.'to` observe that, when. said hooksrare 'inen` 'gagement with saideyes, said means'are in `operative position,.s0 thatA throughthe-depression of the numeral keys the computing.

intowhiehextends a pin 12 'secured'upon the lower arm of a lever`13,`pivotedfat' 14 on lthe plate 2, the up erend of said lever being connected by a link 15 with the-lower end of a switchl lever 16 pivoted at 17 on said plate 2. Stop pins 18 onk theplate2 limit the resting movement of the lever 16.- Also pivpted at 19 upon said plate 'isfahandjlever 20,connected-w1tha link 21which,' at its other end, connected to pin 22': secured in the upper end of alower' arm 231piv'oted upon the lower end of a 'switch lever 16, said pin also entering a slot 24 in' anupper arm 25, secured to a short rock shaft 26,V

which extends `through a sleeve 27 inthe top; of the lever .16 and carries'l upon its Teal' 46nd' 8.11 arm 28 y (F 7), t0 the Outer end of whichl is' connected Va collar 29 which slides' upon a rod 30 connected to abracket 31' yivoted upon they rearside of the plate 2.av

etween said bracket' '.31 and said collar a spring-32 coiled' around said rod.-n i

Shift key vcontrol-#In the Remington machine, as is well known', eachtype bar carries'two types, o@ which one prints normally and the other only when the shift key` is depressed. All of the nine digits are 'arranged in the typewliting machine to correspond to what are Vknown as the lower ease characters of the 'top row of keys 33,

sothat they maybe printed by said keys.

without using the vshift key. Since some other character than anumeral is 'also carriedon each numeraltyjpe bar, therefore,

it the shift key lis used, and a numeral key operated, said other character is then printed. it is therefore desirable at that time to operatively disconnect the computing mechanism from the numeral keys. ln the drawings, (see Figs. 1, 2 and 7.), 3e indicates the typewriter shift key, which is connected in the usual manner by a link 35 to a bell crank -lever 3G, serving to shift the platen 37 in the usual manner. 'llo said bell crank lever 36 is rigidly attached an arm 33, which is connected at 39 to a siphonshaped depressor '-10, of which the rear and longer leg Lil slides in a guide 42 secured upon the rear ot' the plate 2, while the short front leg 3 is adapted to depress the pin 22, when said pin has been moved to its eX- treme right hand position.

rihe following is the operation: In the normal position of the typewriter, in which it is not desired to use the computing mechanism, the parts are in the position shown in lFig. 3. 1t will be seen that in this position the slide bar 5 has been moved to the right, and consequently the hooks 7 are disengaged trom the eyes 8 and the computing mechanism is disconnected. lt will also be seen, upon comparing Figs. 3 and (i, that, if the shift key 3a be operated., the short leg 43, when depressed, will not impinge upon the pin 22 0r any part of the mechanism, so that the printing mechanism is tree to be actuated in precisely the same manner as it the computing mechanism were not attached thereto. When it is desired to bring the computing mechanism int-o continued use, the hand lever 20 is raised, which has the effect ot moving the link 21 to the right, and swinging the lower-and upper arms 23, 25 to the right into the position shown in Fig. Consequently vthe rod 30 also moves to the right, and, when it. does so, the rear arm 28, in rocking from its position on the' lett ot' the pivot 17 to its position on the-right thereof, depresses the upper end of .the coiled spring 32, producing an upward pressure by said spring against the collar 29. rThis upward pressure against said collar 29 produces an upward pressure against the rock shaft 26, and therefore tends to turn the switch lever 16 to the left upon its pivot. rihe turning ot the lever upon its pivot correspondingly turns the lever 13, which moves the slide bar 5 to the left,.into the position shownV in Fig. 5. The numeral keys are thereby all connected with the computing` mechanism which is now adapted for Continous use.

is is well known, in the Remington and other shift key machines, in which the numeral keys are used for printing other characters besides numerals. it is while vthe shift key is held depressed that the striking of a numeral key c-aus the. other character to joe printed. lt is necessary that the computing mechanism be rendered incapable of operation while such other character is being printed, and therefore while the shi't't key is thus held depressed; and it is desirable, for convenience and rapidity of operation, that this disconnection should be done automatically, and that the computing mechanism should be automatically connected again upon the release of the shift key. It will be seen .that this result is accomplished by the mechanism above described, for, as shown in Figs. (i and 7, upon the depression of the shift key, thefshort arm of the depressor i() which is depressed by the depression of the shift key, has impinged upon the pin 22, and has thereby caused the switch lever 16 to swing upon its pivot 17, and move the slide bar 5 to the right, so as to disconnect the computing mechanism from the numeral keys. The parts are then in the position shown in Fig. (i, in which the pin 22 is on the right of the pivot 17, as are also the guide rod 30 and the coiled spring 32. Hence the spring occupies the same position as when the computing mechanism is connected, and, censequently, when the shift key returns to normal position, and carries with itthe depressor l0, raising the same from the pin 22, the spring 32 again acts to move the upper part ot' the lever 16 to the lett, so as to move the slide bar 5 to the left and connect the computing mechanism with the numeral keys. in such a position, since the upper end of the lever 16 is on the right hand side of its pivot 1T, and the spring 32 exerts an upward pressure against said upper end by means of the rear arm 28, the etlfect of the pressure of said spring, when the shift key is released, is to swing the lever 16 from the position shown in Fig. 6 to 'the position shown in F ig. 5.

Temporary reverser-lt may be desired to temporarily disconnect the computing mechanism from the numeral keys, as when it is desired to print .numerals without eti'ecting a computation. For instance, a figure may not havebeen printed plainly enough, and yet the computing mechanism has been already operated, so that a reprinting of said figure would have the et- `tect of repeating the addition or subtraction. Ur, on the other hand, it may be desirable in statistical work to print iigures at different points of the writing line oi' the paper without computing, so that while the computing mechanism should be disconnected for the main portion oi' the line, but, at certain points cn the paper. it might be desired to print figures andalso make a coinputation. .n this or other cases, where it is desired to print figures without effecting a computation` a temporary key 16 is used. The stem i7* ot said key carries a pin e8 which engages an arni #i9 extending from a rock shaft 50, which also .carries ashort arm 51 connected by a link 52 with the pin 22, which is carried by the end of the arm 23, so that the depression of said key 46 has the effect of drawing down the link 52., But, Whether theparts be in the position shown in Fig. 3 or in that shown in Fig. 4, in` either case a downward pull upon the pin 22 Will have the same ultimate effect, for Lit swings the lever 16 upon its pivot -17, either from the position shown in Fig. 3 to that shown in Fig. 4, or from the position shown in Fig. 5 to that shown in Fig. 6, they effect in either case being to move the parts into 'the opposite position to that which they would otherwise occupy but for the depression of said key. This effect is continued so long as the temporary key is depressed. The result is that, if this temporary key should be depressed when the computing mechanism is operatively connected, as shown in Fig.

4, the effect would be to render the computing mechanism inoperative so long as .thea

depression of the temporary key continues, as shown in Fig. 6, permitting figures to be printed Without computation; or, if the temporary key should be depressed when the computing mechanism is disconnected, as shownv in Fig. 3, the effect would be to temporarily connect the computing mechanism, as shown in Fig. 5, and to maintain it connected, so long as thc temporary key is de.- pressed, so that the printing of a figure will correspondingly effect a computation.'

U0ntroZZer.-The stems 6 are connected at i of which are connected to rods 56, passing eta within a ring 57 secured to a bracket 7 4v connected to the plate 2, said rods being connected respectively to blocks 58 connected to levers 59 pivoted on said ring 57. Thus, upon depressing any one of the numeral keys, the outer end of the corresponding lever 59 is moved to the right. Secured on the right hand side of the frame of the typewriting machine is a bracket 60, (Fig. 1) supporting a vertical plate 61, carrying posts 62, supporting a. guide plate 63, having a' circular series of holes, through which extend the ends of nine pusher rods 64, pivotallyv attached to, the several bell crank le.- vers. Said plate 63 is additionallysupported by a strut 73 connected to the bracket 74 attached to the plate 2. Having its bearing in the plate 61 is a Shaft 65 of a controller or primary escapement wheel 66, which, .as will be presently described, is under constant rotational pressure. Stop bolts or escapement teeth 67 of which there should be not less than ten, slide in a circular series of slideways 68 in said controller which slideways register with the pusher rods 64, and said bolts project to the left of said controller normally, and until Lacasse they are displaced by the action of the pusher rods 64. An annular coiled spring 69, which surrounds the controller in a groove therein deep enough to intersect the slideways for the bolts, and. which is adapted to enga e one or the'other of two grooves 70 (Fig. 9 formed in each bolt, yielc'lingly maintains the bolts in the positions to which they have been moved. When any numeral key has been operated, and the corresponding pusher rod moved through the guide plate, its end impinges upon theend of one of the stop bolts projecting from the left hand side of the controller, and moves said stop bolt to the right., so that its other end then projects from the right hand side of the.

controller. The operation of a numeral key not only thus projects a bolt, but actuatcs an'escapement, hereinafter described, for the controller, so that the controller is released and rotates. `Its stoppage, after a certain extent of rotation, is effected by means of the then projected stop bolt impinging against a rotary stopV Wheel or pinion 71, (Figs. 8, 9, 10) and the extent of rotation depends upon its circumferential distance from the stop Wheel, When it was so projected, and therefore upon 4the particular pusher rod and the particular key lever which Were then operated.- Upon the next operation of a numeralkey and rotation of the controller, the stop bolt is, by means of path of the projected stop bolt, returned to its normal position in which it projects Jfrom said controller to the left instead of to the right, and it is retained in that position by the annular coiled spring.

E calmement-Secured upon the front side of said plate 2 is a yguide way 75 for a stem 76, the other end of which is pivotally connected to a lever 77 pivoted at 78 upon the ring 57, to the other arm of which lever 77 is secured a sprihg 79, which. normally tends to draw said arm to the lett, and therefore said stem to the right.' Said stem 76 carries a disk 80, and all of the rods 56 pass through holes in said disk.

1When any numeral key has been operated, and thereby the corresponding rod 56 moved to theleft, the-block 58, by which it is connected to the bell crank lever 59, then abuts against said disk 80, and carries said disk with it to the left, thus rocking the lever 77. The long arm ofl said lever is connected at its extreme endlby a link 81 with an arm 82 on an escapement controlling 'rock-shaft 83, so that, by said movement of said lever, said escapement shaft. is rocked. Said escapement shaft carries two disks 84, 85, (Fig. 12) spaced aparta short distance, and

having respectively formed in their beveled itself held fast and non-rotatable.

Lacasse carries the before-mentioned stop wheel or pinion 7l, which is star-shaped, having points any of which is adapted to lie in the ath of a bolt in the controller which has en projected to the right, and arrest said .controller if said stop shaft is at that time Secured upon the end of said stop shaft, upon the right hand side of the plate 61, is a secondary .escapement wheel 89, having the same number of points as the wheel 71, a point of which escapement wheel normally abuts against the first or rear disk or dog 84. Therefore, when any numeral key has been actuated, and therebythe escapement shaft 83 rocked, the disk 84 is thereby moved until the notch 86 therein comes opposite to the point of the escapement wheel 89, which can then immediately pass through. said notch. This it immediately does, because, as already mentioned, the controller shaft is under constant rotational pressure, so that the previously projected bolt is pressing against a point of the rotary stop wheel 71. After said point has passed through said notch 86, it then abut-s against the second disk 85, and the stop shaft is again held from further rotation. Thev slight movement thus given to the stop wheel 71 allows the bolt or tooth 67 arrested thereby to move only a very short distance. Then, upon the release of the numeral key, the escapement `shaft 83 returns to its original position, in which position the notch 87 in the second disk 85 now comes opposite to the said beveled point or arm of the. escapement wheel 89, which thereupon escapes therethrough,

under the pressure of the projected stop bolt against an arm of the rotary stop wheel 71.

This pressure rotates the shaft 88 so that the next succeeding arm of the rotary stop wheel is brought into the path of the last projected bolt, which then impinges against said latter arm, thus again producing rotational pressure on the stop shaft, rotating said shaft until the next succeeding'` stop wheel 71, of the pusher rod actuated,`

and therefore upon the key which is operated. f

Drv'ng.-lt has been already mentioned that. the controller shaft- 65 is under conparticular numeral stant rotational pressure, tending to rotate said shaft whenever released by the`l escapement. This rotation is derived from` any suitable motor, an electric motor 92 being shown herein. The shaft 93 of said motor has secured thereon a head 9st to which are secured by screws 95, the ends of three spring which bear against a fiber lining 98 of a cupshaped head 99 secured upon a shaft 100 having a bearing in a bracket 101 secured to the plate 61.

Said shaft 100 has secured thereon abevel gear 102, which meshes with a bevel gear 103 on a shaftlOt rotating in a bracket 105 secured to the inner side of the plate 61, as shown in dot-ted lines in Fig. 29, and carries on its outer end a gear wheel 106 which meshes with an idle wheel 107, which in turn meshes with a gear wheel 108 upon the controller shaft 65. Tt is by this means that the controller shaft is given a constant rotational pressure always in the same direction, rotating the shaft whenever it is released.

In order to varyothe amount of friction transmitted from the rotating shaft, the outer end of the motor shaft 93 is threaded, and upon said threaded end is screwed a fianged sleeve 109 which is adapted to bear against the spring arms 96. By screwing said sleeve in or out, the pressure upon said spring arms, and therefor the pressure of the shoes 97 against the lining 98 of the head, is increased or diminished as desired.

Computing mechanism-The frame of the computing mechanism comprises end plates 110, 111, and a series of transverse partitions 112. These partitions are connected by an upper bar 113 and two lower bars 114:, 115, and are spaced from each other by sleeves 116,v around the bars. Said bars at one end, after passing through the end plate 110 into the late 61, are secured by means of screws 117 (Fig. 13). Upon the other ends ofsaid bars where they pass through the end plate 111, are screwed nuts 118, washers 119 being interposed between said sleeve and a partition occupy a longitudinal distance equal to that of four typewriting spaces. Between two adjacent partitions are interposed three register wheels 120, each of the width of one typewriting space, and two spring washers 121, 122, next to the respectivepartitions, which washers and a partition together occupy a distance equal to one typewritihg space. Said register wheels 120 are in the form of rings supported upon a hollow shaft 123 of comparatively large diameter, supported by the partitions and lend plates. Each register Wheel has formed on one side thereof a thin gear wheel 124, by means of which it is rotated in the manner tov be presently described. On each side. of the middle register wheel is a thin washer 125, shown in detail in F ig. 16,' havingan upper circular opening 126 which surrounds the hollow shaft 123, thereby supporting the Washer on Asaid shaft, having also a lower circular hole 127 and a foot 128 contained between the sleeves 116.

1n oblique slots in the front edges of partitions and end plates is a shelf.129. Also extending through all the partitions is a carrying wheel shaft 130, having thereon a series of carrying wheels 131, each formed with gear teeth 132. Supported on one side by said gear teeth 132 and on the other side by the shelf 129, (Fig. 15), are a series of computing wheels 133, each computing wheel being of a thickness equal to one typewriting space. Secured in the partitions are short spacing cylinders 134 of a thickness equal to one typewriting space, and co-axial with the computing wheels.

Each computing wheel 133, shown in dctail in Fig. 19, is formed on one side with gear teeth 135, adapted to mesh with the gear teeth 121 of the corresponding register wheel, and is also formed, next to said gear teeth 135, with an annular shoulder 136, upon which is a single carrying tooth 137 forming a lateral extension of one of the gear teeth 135. is also fo-rmedwith a reduced hub portion 138, (Fig. 13) which, of the left hand o ne of the computing wheels of a group of three, rotates within the spacing cylinder 134 contained within and secured to the partition on its left.

Through said computing wheels passes af longitudinal computing shaft 140, rotated in a manner to be presently described, and upon which shaft can slide la sleeve 141. The shaft 140 is preferably square, and the sleeve has a corresponding square opening fitting snugly on the shaft, so that said sleeve always rotates with the Shaft. Said sleeve (Fig. 22) at its advancing end 139 is rounded or tapering, and at the rear end is formed with an annular groove 111-2, and in said groove are pins 113 projecting inwardly from the end of a non-rotatable tube 144 which can telescope around said square shaft out of contact therewith. Said sleeve 1&1 is formed with actuating pins 145 which are adapted to engage one or the other of ten recesses 146 formed by internal gear teeth 147 within the computing wheels. As will be presently described, the tube 144,

and therefore also the sleeve 141, travelwithin the said'computing wheels through a distance of one typewriting space with each step movement of the typewriter carriage, and in the positions of rest is either at the middle of a computing wheel or at the middle of a spacing cylinder 134 between two groups of computing wheels. By the rotary movement of the square shaft, to be presently described` the'actuating pins 145 -are always rotated through an exact multiple of one tenth of a revolution, so that, after/making a rotation wlthm any comput- Each computing wheel 133.

4on the left thereof (see Fig. 14).

ing wheel and thereby causing the computing wheel to rotate with them they are 1n position on the next advance to be moved longitudinally and exactly mesh with some one pair of opposite recesses of the next computing wheel. The rotation thus imparted to the computing wheel causes the register wheel to rotate through a corresponding angular distance.

Transfer mecha/nz'sm.-Each time that the computing wheel makes a complete revolution, the single carrying tooth 137 formed thereon engages one of five lugs 150 of a cai'- rying wheel 131 loose upon said shaft 130, the gear teeth 132 of which mesh with the external gear teeth 135 on the right hand side of the next computing wheel 133 on the left, and said wheel 133 on the left is thereby partly rotated through one-tenth of a revoslightly greater diameter than that of a transfer cylinder 153, preferably of rubber' or other resilient material, secured to a shaft 154 and rotated herewith, which shaft, as hereinafter described, constantly rotates. Said shaft 181 is supported in bearings at suitable intervals in the partitions and end plates, or if desired, may be journaled only at the ends. lVhen, by the advance 0f the single carrying tooth 137 in the manner just explained, the carrying wheel has een moved through an angular distance corresponding to a part of one-tenth of the revolution of the computing wheel, itis then in such a position that one of its projecting portions 155, between two adjacent concavities 152, has been forced into suiiciently close contact with the constantly rotating transfer cylinder 153, and is rotated with the latter until its next concave side 152, in turn, as sumes a position over the rubber body 153 of the transfer shaft 151.

The hub of each third carrying wheel is of a sufiicient length, as shown at 118v in Fig. 20, to extend through a partition being 4permanently supported therein to carry from the computing wheel on the right hand side of the partition to the next computing wheel Suitable spacing washers 119 are provided kto maintain such carrying wheel in its proper relation to the other wheels. The spacing cylinders 134 are cut away, as shown at 223 to permitr the carrying wheels 131 vopposite thereto to freely rotate` 1n' order to aline the figures on the register wheels, and to insure that the carrying wheels 131 are not unduly rotated, there is provided, for each such carrying wheel, a pivoted arm 156 carrying a roller 157 which is pressed by a spring 158 into one of the concave sides 152 of said carrying wheel. It will thusbe seen that each computing wheel cannot be advanced by the t'anst'er mechanism more than one-tenth ,of a revolution, first, because ot the roller 157, and second, because of the form in the peripheries ot the'carrying wheels, the points of which cannot take hold of the rubber body of the transfer shaft and rotate with it, unless positively forced thereinto. It will be seen that all ot' the computing devices contained in the io main computing mechanism are operatively connectedV throughout the entire series, so that the whole series can be used for a single column or tor a variable number of indel pendent columns. l5 The entire mechanism is covered by a casing 159 having a slot 219 through which a line ot' figures on the register wheels is eX- posed to view.

.fndepmz (Zent (Ze/01m nation/1.2 computazione-The above construction and arrangement of computing wheels, carrying wheels` and transfer shaft constitute what is believed to be a novel form ot computing mech- -anism for machines, such as adding machines, in which a rotary impulse is imparted directly to a series et devices in succession, corresponding to the several denominational values of the computing machine.

Each computingl wheel is positively geared 3o with its carrying wheel on the right, that is, the carrying wheel which connects it with the next computing' wheel on the right, but its only connecti' n with its carrying wheel on the lett, which arries to the nent eomputing Wheel on th lett, through its carrying tooth. Ther each 'time that a computing wheel i i its carrying `wheel on the i. tnereto, will also l will not roon the right, `wheel on tooth i, "nit 'to the displayv :ligure 9 in addition, or C in subn. or, when a compiling el tate the nerr-t compu eren though said i li. f l -lww d A Y the iignt stand g 'i the position corres i wheel thisposition, the rive lugs lo() on arrving Wheel on tire ett can i L onsequently, 2ans lted 'from a inpn ig wheel computing 'wheel on the carrving Wnee +3,12 www2 i .Ln 1f: if" 'Y c trying toorn lo? or wheel, when either at 4 9 9, or such a. 'position that the tive 1, carrying Wheel do not engage said carrying whee rotates iion, it. is evident. that said the r to t ansniit, through heel. the computing on the left, an amount of rotation, namely, one-tenth of .a revolution, equal to thattransmitted to said carrying wheel from the computing wheel operated, since the tirst part ot' this rotation is made without pro- 70 (lucing .any motion of the said carrying wheel. Now, although the latter part ot' the motion of one-tenth of a revolution of the computing wheel, after it. comes in through operative engagement with the 'ar- 75 rying wheel on the lett, is effective in imparting only a partial rotation to said carrying wheel, yet this is sutlicient, tor it is sutticient, to cause a projection 155 of the carrying wheel to engage the rubber cylinder S0 153 of the transfer shaft, and since the latter is in constant rotation, the transfer shaft completes the work which was omitted by the computing wheel in the first part of its rotation, and moves the carrying wheel through the remainder of the necessary rotation to rotate the computing wheel on the left through one-tenth ot a revolution.

Thus the computing wheel stands in such a position, when at 9 or 0, that the 9o carrying wheel on the lett can be treely rotated in either direction, and, because this arrangement necessarily requires lost motion ot' the computing wheel on the right, l compensate for this lost motion by proriding extraneous means tor rotating the carryingwheel through the latter part ot its movement. This carrying wheel rot-ating means may however be used with many other kinds of tens-carrying mechanisms, particularly where it is desired to taire up lost motion.

upZicote omit/,rutafiom-The machine a, shown provides for two independent coniputing mechanisms, the secondary e input.- ing mechanisms and its operating nieans being hereinafter more fully described. luch parts thereot' as it is necessary to refer to will be designated by the atii; X aiiiied to the 'nume-'al et the corresponding part ot the main mechanism.

rtdfizton um! ,ubtrfzf''ion-wrfhe computing shafts 1&0, 140x, have respectively secured upon the ends projecting thi' Y, plate G1 `beitel gears 160, 160x, which adapted to be driven by a vertical shaft, iol having at the lower end a bevel gear meshing with a bevel gear 1 tiret gear 163, which meshes with an idle pi" 1GB", the latter meshing with a r mounted upon a horizontal shatta bevel gear 165 driven by a bevel upon the controller shaft ll'Yhc-,n controller shaft has been released by depression a numeral key and through an angular distance correspom to the numeral key depressed. said is transmitted to the vertical shattthence to the shafts MO, NOX, selectively, in one or the'othcr direction by means ot sliding clutches 167, 167", siidable upon said vertical shaft 161 lbut rotatin therewith. By means of a lever 168 the c` utch 167 is adapted to 'be brought into operative engagement with either of two bevel gears 169, 170, loose on the shaft and always in enga-gement with the bevel gear 160. If said lever 168 is moved upward, then the clutch 167 ismoved into engagement with a clutch member 171 formed within the u-pper bevel gear' 169, thereby rotating4 the computing shaft 140 inthe direction proper for addition. If said lever is moved dow-nward, the clutch 167 engages the clutch member 172 of the lower bevel gear 170 and rotates the shaft 140 oppositely to its former direction, causing the computing wheels to subtract. Ifsaid lever is moved toamediate position, the clutch 167 is out of engagement, and the computing shaft 140does not rotate. In order to retain the lever 168 in any p0- sition to which it has been moved, there is provided a, pivotedl bar 173, secured tothe front wall 174, of a casing 175 aroundthe. end gearing, saidbar having three notches 176 adapted to selectivelyreceive the edge o f the lever 168, and vthe bar being pressed against'said lever by a spring 177.

167x, 1685, 169x, meenden@ parts foin the secondary mechanism corresponding to the parts 167, 168, 169,173, of the mainv mechanism.

The transfer shaft-154r has a constant ro-` tarymovement which is derived from the electric motor 92 by means of a gear wheel 180 on the shaft 93 ofthe motor, meshing with an idle gear wheel 181, .which in turn meshes witha gear wheel 182, on a shaft 164'; carrying a bevel gear 163 which meshes with a bevel gear 162 on a vertical shaft 161', with which'coperate parts similar in their general construction and arrangement to those immediately coperating with the..vertical shaft 161, except as to the form of the clutch sleeve 167', which, in this case, has ,only a pair of teeth 182a instead'of a number thereof, on each'side, the reason being that said shaft 161 revolves constantly vat a rapid speed, and gwhen the direction of computation is changed, this must be done while said shaft 161 is in motion, Whereas the direction of motion of the computing shaft 14:0l is never changed except when the shaft 161 is at rest. By arranging that the clutches 167, 167', for the comput-l ing shaft and for the transfer shaft are actuated by a common lever 168, it is insured that the transfer shaft willyalways be rotated in lunison .with the computing shaft.

g Multiply/ng devoesf-The horizontal shaft 1641, which has hereinbefore been explained, is lrotated upon1 the'd'epression of any nu merel key, and earries a clutch A, keyed or splined to the shaft at B, Fig. 30, to rotate t erewith and: slide thereon, This. clutch.

or clutch-member A is normally'in engagement with an internal clutch C, on the gear 163C, the latter loose on shaft 1611. The gear 163C, as already explained, meshes with the idle pinion 163", loosely mounted upon a fixed horizontal shaft D; and 163" meshes with gear 163a which is fast upon horizontal rotatable'shaftE,` (to which is fixed the bevel pinion 163)'. By this means the vertical shaft 161is normally driven from the .motor 92 for eitheradding or subtracting.'

ter wheel 145, so that other connections may' be substituted or rendered effective.

YThis disconnection of the clutch AC is effected through the disk F, around which are grouped horizontal rods J, carrying at their front projecting ends keys K; said rods `A G,each key stem J carries an arm or finger' L, engaging the front side of'said disk F, so that when any key is pressed reanwardly, said disk and the` clutch member A are Apushed back against spring G, and the gear 163c isI thereby 'released from the driving shaft 164. y

Upon the shaft 164 are also provided eight other clutches or clutch members M, similar to A and similarly splined to the shaft 164,

and each mounted to Amove independently of the others. 4'l`hese clutclfmembers M are adapted to move into engagement with internal clutch members N, Fig. 30, formed in gears O loose on the shaft 164, and ranged, at intervals therealong.

Each of the key stems J also carries an arm or finger P. These fingers P are ar ranged, however, at different points along vthe'stems J, each of said stems being con- A nected'by its finger P to a certain one of the clutch members M, the latter having grooved collars Q to receive the fingers P. Thus, al! of the keys AK will Vdisconnect the shaft 164 from the gear 163, but each of said keys K connects a diEerent one of the primary gears O to said shaft 164,

Each ofsaid primary gears AO meshes with per oose upon the iied shaft the l pinions being hired to a companion LVr S, of diderent diameter from and each gear S in turn meshing with a pinion T upon the bottom shaft E, to turn the latter, and, 'through the bevel gear 163, to rotate the Vertical shaft 161, and hence the master wheel 1115 and the computing` wheels. rlhus, each key K causes a diderent set of back gears to control the shafts E and 161, so that a variable rotation of the master wheel 1&5 is caused, depending upon .which key K is operated.

The wheels 0, R, S and T, corresponding to the several clutches and key stems or ushrods already mentioned, have such re ative diameters that the ratioof speed of the shaft E to that of the shaft 16aL varies in proper relation to the particular key operated. rlhis, upon operating the multiplying key K which bears the numeral 2, the speed of shaft E will be twice as great as its no1'- mal speed, (z'. e., when used for ordinary addition or4 subtraction), or in other words, it will make twice as many revolutions and e'ect twice as many turns of the master wheel 1415 and the computing wheels controlled thereby; so that twice as much will be added. Said key K bearing the number 2, if pushed as far as permitted by.

stop .ld and eid back during the depression or the numeral key bearing t e number 7, for instance, will cause twice 7 or 14 to be added upon the adding wheels. If the key K bearing the number 3 is held back while the numeral key 7 is operated, three times 7 or 21 will be added upon the computing wheels, and so on; so that on pressing back the key K carrying the number 9, during the operation of numeral key 7, 9 times 7 or 63 will be added upon the numeral wheels 120. Corresponding results will be obtained oi course by operatino1 any of the other numeral wheels: an consequently the distance through which the computing shaft of each of the .primary or secondary com uting mechanisms rotates upon the depression of any numeral key of the typewriter, will, when the multiplying key K bearing the number 9 is depressed, be 9 times as great as the distance through which it rotates upon the depression of said numeral key alone.

Upon the shaft E there are also provided clutch members U, splined to shaft E inthe manner already described with reference to the Clutch A, and movable along said shaft independently of one another, and constructed to engage internal clutches V provided in the inions T, Fig. 30, but normally disengaged tiierefrom. Each of said clutches l? has a collar W engaged by Aa finger X, said lingers X carried by the keystem J for a vpurpose similar to the linger P, so theftl whenn any clutch M is operated, the corre spending clutch U is similarly operated, so

that when any main gear is connected to the sha-ft 16st, the gear T at the other end oi? the set of gears is simultaneously connected with shaft E; all the other sets oi gears U, ll', S, T, remaining stationary while any one set is active.

The pair of gears R, S, may be confined between collars Y fixed upon the stationaryA shaft D; `and any suitable brake, as for instance a friction washer Z between the collar Y and the gear S, may be provided for holding each set of gea-rs stationary when out of use.

ln operation, supposing that it is desired to multiply 123i by 5, the operator pushes the multiplier key K No. 5 and depresses typewriter numeral keys corresponding to the gures 1234, and the register wheel shows the roduct. Supposing it is required to multiply 1234 by 56, the operator rst presses and holds back the multiplier key K No. 5, while he depresses successively the numeral keys for the igures 1284, then ret-urns the carriage to the point or letter-space, (in the ordinary movement of the carriage) next following that at which the multiplication by 5 was commenced, presses and holds the multiplier key K No. 6, while he again depresses the numeral keys for the gures 1234.

In this operation, the number 123e is written upon the paper while the key K bearing the number 5 is pressed back, and 61700 appears upon the numeral wheels 120, Fig. 1. The operator then runs the carriage back until the index 185 is opposite the number c1 where it appears on the computing wheels 120, and then holds back the key K numbered 6 while he again operates thc numeral keys of the typewriter 1234; the types striking over the type impressions a1- ready iliade, or else in a new place on the Work sheet, if desired. The machine will automaticallyr` add 7404 to the amount 61700 previously obtained, and the number 69104: will show upon the number wheels 120. ln other words, the machine not only multiplies 1234 by 6, but simultaneously adds the product of such multiplication to the previously obtained amount 61700.

Provision may be made, if desired, to prevent the writing of the multiplicand when multiplying the same by the second and subsequent gures of the multiplier. This may be done by placing a shield over the paper, at the printing point, or by pressing thev numeral key slowly, so that it will not print, or by other means; or, if desired, the laten may be 1ine-spaccd and the multip icand may be written in a separate place each time that it is multiplied, to show that no error has been made in striking the numeral keys.

Division-By moving the levers 168, 168, or either of them, to ...ract, the operation of division may rom. o., be performed, in the following manner:

Assuming that 75897 is to be divided by 356the operator (noting that the devisor will go twice into 758), presses the key K which bears the number 2, and at the same time strikes successively the numeral keys bearing the numbers 356. The consequence of this operation will be that the machine Will subtract twice 3, 5, 6 (or 712), from the 758 which forms the first part of the dividend; and therefore, ,the number 4697 will appear on the number Wheels 120.

The operator, then noting that the divisor will go once into 469, simply touches the numeral keys 3, 5, 6, and the machine subtracts this from 469 which makes the firstv part of the number 4697 ,v and the result thereupon shown on the number wheels 120 is 1137. The operator then notes that the divisor will go three time into 1137, and consequently presses the key K which is marked 3, while he again depresses the numeral keys 356. The machine accordingly subtracts three times 356, (or 1068) from 1137, leaving a remainder of 69, which shows on the numeral wheels 120. The quotient therefore is 213 69/356. In other words, the number 2 on the key K, which was first pressed back, forms the first digit of the quotient; the number 1, of course, forms the next digit; and the number 3, which was the last key K that was pressed back, forms the third digit. Regarding the second digit in this quotient, it will be understood that the mechanism was normally in condition to multiply the divisor by 1 and simultaneously subtract the product thereof from the dividend.

The invention as so far described, may of course be applied to other typewriting machines, as for instance, the Monarch type; writer, illustrated in my pending application filed August 16, 1907, No. 388,466. The operation of either multiplication or ydivision may bc facilitated by the use of the decimal tabulator, and lin-by-line paperfeeding mechanism connected tol said tabulator, described and illustrated in said application No. 388,766; t0 which reference is hereby made for a detailed description.

Grouping-The figure wheels are visibly spaced into groups of three, each group, together with the spacing means, occupying four writing spaces of the typewriter. The spacing is preferably effected by the partitions, one of which is interposed between each group'and the neXt, as shown in Figs.

13, 14, and occupies the fourth writing space,

or a portion thereof. 1f it occupies less than a full fourth writing space, thethree figure wheels which occupy the remainder of the four writing spaces of the group should be made correspondingly wider, but always so that the sum of the widths of the three figure wheels, together with that of the nes-1,559

spacing means, is equal to four spaces of the typewriter.

The computing wheels are also divided into groups of three by the partitions, and the hub 138 of the computing wheel at the left of the group rotates in the spacmg cylinder 134, which is of sufficient internal diameter to permit the actuating pins 145 to rotate freely therein.- Hence said pins have no effect on the computing mechanism, in case the computing shaft should be rotated at the time the actuating pins are at any such fourth space in the computing mechanism. This arrangement provides that, without disconnecting the numeral key levers from the computing mechanism, the machine is free to operate at each fourth writing space without affecting the computing wheels, s o that this lspace can be used for pointing olf the hundreds from the thousands, the thousands from the millions, and so on, and for separating different columns, thereby avoiding any derangement of the 4computing' mechanism, or error in the computation, through erroneously striking a numeral key at that point.'

In order to ascertain at any desired time the points at which computation is taking place, either in the vertical or in the horizontal computing mechanism, there are providedmovable pointers 185, which are each in vertical alinement with the actuator pins of the corresponding computing mechanism.

Horizontal 'computing laecltafrt/s/l/zt-The secondary mechanism is similar to that of.

the main in the relation of the computing wheels to the figure wheels, in the general construction of the transfer shaft, andin the clutch mechanism for shifting both the computing and transfer mechanisms vinto any one of three positions, to add, to subtract, or for throwing out of operation. The description, therefore, of such parts of the main computing mechanism as are also found in the horizontal computing mechanism applies also thereto, corresponding parts being indicated by the affix X for the horizontal computing` mechanism.

One object of the horizontal computing mechanism is to furnish a cross computa tion of a row of figures whether added to, or substr-acted from, the several columns which are being computed by the main computing mechanism, as said figures are progressively written in said columns. This mechanism is also adaptable for a billing machine, that is, a machine by which there is obtained a balance of one or more columns in which some items are; to be subtracted, as well as others added, the machine being provided with means for obtaining a horizontal computatimi of two or more rows, or a balance or difference of two numbers in a row, to write the total or dierence in a sep- 

